Created the classes of states

application.cpp

+#include "application.h"
 #include<iostream>
 
 int main() {
-	std::cout << "it`s pacman!";
+	Application app;
+
 }
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application.h

+class IState;
+
+class IStateManager {
+public:
+	IStateManager() = default;
+	virtual ~IStateManager() {};
+
+	virtual void set_next_state(IState* state) const = 0;
+};
+
+class IState  {
+public:	
+	IState(IStateManager& state_manager) : m_state_manager(state_manager) {}
+	virtual bool do_step() = 0;
+protected:
+	IStateManager& m_state_manager;
+};
+
+class Application : public IStateManager {
+
+public: 
+	int run() {
+
+	}
+private:
+	void set_next_state(IState* ptr_state) const override{
+
+	}
+	void apply_deffer_state_change() {
+
+	}
+private:
+	IState* m_ptr_state_next;
+	IState* m_ptr_state_current;
+};
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